—The study objective was to investigate the response of salmonid populations to disturbance in Oregon Coast Range streams in two rock types, basalt and sandstone. Salmonid abundance was estimated in a total of 30 km of channel in 10 Oregon Coast Range streams with similar basin areas (14–20 km2). These basins had a range of disturbance caused by timber harvest, fire, and salvage logging. Mean c...

The question of whether basaltic rocks in continental flood basalt provinces are primary magmas or whether they are descended in general from picritic parent magmas is reviewed. It is suggested that the latter is more likely to be correct on the evidence of phase relations and the relative rareness of mantle materials with appropriate Fe/Mg ratios. Major element variations in the residual liqui...

Introduction: We present the first mineralogical and oxygen isotope data for the new eucrite Northwest Africa (NWA) 5073 that has some unique features. This meteorite is a desert find with a total mass of 185 g and represents a non-brecciated unequili-brated eucrite with the coarsest texture ever found among samples of the HED suite. Results: NWA 5073 has a basaltic texture, mainly composed of ...

In the current study moment - curvature behavior of basalt fibred concrete beams made with fibre reinforced polymer bars and normal steel rebars are evaluated. Basalt M30 grade were casted BFRP separately to flexural properties bars. From load –deflection plots, characteristics such as at first crack, ultimate strength, deflection centre crack width failure Deflections measured central point un...

Craters can create windows into subsurface geology. Hydrothermal alteration products that correlate with ejecta from small craters (<100 m deep) can flag possible near-surface hydrothermal activity. A region with such activity is a highly prized target for Mars exploration. Here we describe an airborne (satellite analog) study that identified mineral indicators of hydrothermal activity exposed ...

Virtually all of the economic Ni–Cu–(platinum group element (PGE)) mineralization in the central part of the Cape Smith Belt of New Québec is hosted by thick olivine cumulate units in the Katinniq Member of the Raglan Formation at the base of the 1.9 Ga Chukotat Group. These units transgress underlying gabbros and pelitic metasediments, forming 50–200-m deep and 300– 1,000-m wide V-shaped embay...